CVE-2026-85114
High
Description
A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.61). Affected applications do not properly validate filenames received from remote servers during ticket downloads. This could allow an attacker who can manipulate the ticket response to write arbitrary files outside the intended download directory and, when overwriting is enabled, replace existing files accessible to the application.
SeverityHigh
CVSS7.5
Exploit probability—
Product.NET Client Library for SIMATIC S7 Webserver API
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- Siemens .NET Client Library for SIMATIC S7 Webserver APIV3.3.61 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Siemens .NET Client Library for SIMATIC S7 Webserver API | v < V3.3.61 | V3.3.61 |
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